Malicious PDF — malware analysis report

Static analysis result for SHA-256 259b5f06e9962191…

MALICIOUS

PDF

45.1 KB Created: 2020-11-07 05:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a249138c326832071f62f1c9d5cad7da SHA-1: 9401ff5239d40ca7b02d3ede5928c7599364f3c3 SHA-256: 259b5f06e9962191a54dcbe36ae9fc7f2e39658dc60e191bd61430381481df36
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/aws?keyword=manual+for+hp+photosmart+7520 PDF link annotation
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/58da30bfd14.pdfIn PDF document text
    • https://givovirudodax.weebly.com/uploads/1/3/4/5/134587764/buwonulusin_rokumafemapu_jexunomed.pdfIn PDF document text
    • https://rogenogenitel.weebly.com/uploads/1/3/4/3/134316557/9882895.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/english_phonetics_and_phonology_philip_carr.pdfIn PDF document text
    • https://joxonep.files.wordpress.com/2020/11/96408350088.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://fiwanawid.files.wordpress.com/2020/11/pioneer_vsx_932_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80650589-900d-44d6-a25a-28730e150555/podofogodir.pdfIn PDF document text
    • https://lukamukiza.files.wordpress.com/2020/11/good_habits_story_in_english.pdfIn PDF document text
    • https://jasobegofur.files.wordpress.com/2020/11/veruzavizotarelurib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/802aedaf-373b-46bd-8048-a3630ad1b5d6/51064315439.pdfIn PDF document text
    • https://tobaluli.files.wordpress.com/2020/11/xebuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e8fdf7-54a3-425c-b633-22645079219b/connectify_hotspot_crack_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a96a73e-f580-49b3-aeca-b5b6d37776f8/83883837883.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9D 5624 bytes
SHA-256: ca354bb52e33614d9341f70a240e1938b9afa09cf8445b35e55fef7bef15783e
font_01_sfnt_off00006eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAB 10492 bytes
SHA-256: b00fbda6072b979f39a752524c19620e5abf1d26277df03e783b06c114d09ab2
font_02_sfnt_off000092af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AF 16084 bytes
SHA-256: 2c93c698e70efa444ebf79a8a2f39cbb1cc2f89adc6966ae964110355d2e6496

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